GR7 Construction Tolerances Further Information...
Applying the Tolerances Rule
Using tight Construction Tolerances is more important later in the design process:
Breaking the Rule
You can ignore the tolerance settings if you are:
- Just practicing your Alias skills, for example doing the Fundamentals Skill Builders.
- Creating models for rendering and animation only.
The key setting is Maximum Gap Tolerance
The key setting for data transfer is the Maximum Gap Tolerance, as this determines whether surfaces can be considered 'joined' when transfered to a solid-modelling or production CAD system.
Why not set the tolerances to the tightest possible settings?
Each surface tool (Skin, Rail etc.) or operation (Intersect, Trim, Align etc.) refers to the Construction Tolerance settings to determine how accurately to be applied. Greater accuracy can lead to longer calculation times, so try to select the right settings for the stage of work that you are at.
As you gain production experience with Alias, you will become more confident in choosing how and when to apply different tolerance settings. As a beginner, the easiest choice is to use one of the Construction Pre-sets.
Further Information on Construction Tolerances
For more detailed information on construction tolerances:
- Continuity 2: Construction Tolerances Theory Builder
- Alias Help on the Preferences → Construction Tolerances tool.